Device eob bolting floub



* UNiTnn srans 'Pr union WM. IIALDERMAN, OF FREEPORT, ILLINOIS.

DEVICE FOR BOLTING FLOUR.

Specification of Letters Patent No. 29,488, dated August '7, 1860.

T o all whom it may concern:

Be it known that I, 1V. HALDERMAN, of Freeport, in the county ofStephenson and State of Illinois, have invented a new and ImprovedBolting Device for Bolting Flour and Meal; and I do hereby declare thatthe following is a full, clear, and exact description of the same,reference being had to the annexed drawings, making a part of thisspecification, in which- Figure l is a longitudinal vertical section ofmy invention taken in the line Fig. 2; Fig. 2, a horizontal section ofthe same taken in the line y, y, Fig. 1.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in the employment or use of screens having avibrating motion and used in connection with endless conveying aprons,the screens and aprons being placed within a suitable case or box andarranged in such relation with each other and with proper spouts, ashereinafter fully shown and described, that a very compact and eiiicientbolting device is obtained and one that may be very readily adapted forbolting different kinds of flour and meal, or, in other words varied inits operation as the nature of the work may require.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, is a rectangular case or box supported at a suitable height by anyframing, and B, is a power shaft secured to the upper part of the caseor box at one end. At the opposite end of said case or box there isplaced a. shaft C, the inner end4 of which has a bevel wheel a, on itsaid wheel gearing into a corresponding wheel b, on a vertical shaft D,the bearings of which are attached to the case or box. The ends of theshaft D, are provided with cranks 0, c, which are placed at right angleswith each other. The shaft C, is driven from the shaft B, by a belt d,which passes around cone pulleys e, e, on said shafts.

Within the case or box A, there are placed two rectangular frames E, F.These screens are constructed by stretching suitable boltin cloth overframes f, and inserting the (Iatter in shallow boxes g, g, havin each adischarge aperture z..

Ihe screens E, F, are slight-ly inclined in reverse positions as shownin Fig. 1, and

they are connected at one end to the cranks c, c, by yokes t, and areconnected at the opposite end by yokes z', to cranks y', on a shaft G.The screens E, F, are placed one directly over the other and between thetwo there is placed an endless apron H, one roller 7c, of which isdirectly over a discharge spout Z. The lower or depressed end of thescreen E, is directly over a spout m, which extends down over theelevated end of the lower screen F, as shown clearly in Fig. 2, and thelower end of screen F, is directly over a spout a. Below the screen F,there is placed an endless apron I, one roller a, of which is over thetop of a discharge spout 0.

The operation is as follows: The flour or meal passes through a spout J,and is discharged on the elevated end of the upper screen E, which aswell as the lower screen F, has a curvilinear vibratory movement, thecranks c, j, giving them said movement. The superfine flour passes throuh the upper screen E, and falls on the enc less apron H, which conductsit to the spout Z, through which it is discharged. The coarse portionsthat will not pass through the screen E, is discharged through the spoutm, and falls on the elevated end of the screen F, and in passing alongsaid screen the finer portions pass through and drop on the endlessapron I, which conveys it to the spout 0, through which it may bedischarged into elevators for the purpose of being again conveyed to andthrown on the screen E, and rebolted. The bran or oifal is dischargedfrom the end of screen F, through the spout a. The endless aprons H, I,are operated from the shaft B, by belts b, c, see Fig. 2.

The screens E, F, operate much more effic iently than the ordinaryrotating reel bolts as the whole surface of the former is employed atonce, whereas only a fraction of the area of the latter is employed atthe same time. Hence the process of bolting is greatly expedited, and inconsequence of having the bolting cloth stretched on or attached toframes f, dierent numbered cloth, or that varying in fineness may beemployed in the screens as the nature of the work may require. The speedalso of the screens may be varied as required by adjusting the belt (Z,on the cone pulleys c.

I do not claim broadly and separately the employment or use of vibratingscreens for they have been used for analogous or 0, a', arrangedrelatively With each other similar purposes, but and Within a case orbox A, as and for the I do claim as new and desire to secure purposeherein set forth. by Letters Patent- 7WILLIAM HALDERMAN. l 5 Theemployment or use of the vibrating l/Vtnesses:

screens E, F, in connection With the endless VILLIAM M. BUCKLEY, apronsH, I, and suitable spouts J, Z, m, M. E. HARNISH.

